acpi.c revision 126517
1/*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4 * Copyright (c) 2000, 2001 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: head/sys/dev/acpica/acpi.c 126517 2004-03-03 03:02:17Z njl $ 30 */ 31 32#include "opt_acpi.h" 33#include <sys/param.h> 34#include <sys/kernel.h> 35#include <sys/proc.h> 36#include <sys/fcntl.h> 37#include <sys/malloc.h> 38#include <sys/bus.h> 39#include <sys/conf.h> 40#include <sys/ioccom.h> 41#include <sys/reboot.h> 42#include <sys/sysctl.h> 43#include <sys/ctype.h> 44#include <sys/linker.h> 45#include <sys/power.h> 46#include <sys/sbuf.h> 47 48#include <machine/clock.h> 49#include <machine/resource.h> 50#include <machine/bus.h> 51#include <sys/rman.h> 52#include <isa/isavar.h> 53 54#include "acpi.h" 55#include <dev/acpica/acpivar.h> 56#include <dev/acpica/acpiio.h> 57#include <contrib/dev/acpica/acnamesp.h> 58 59MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 60 61/* Hooks for the ACPI CA debugging infrastructure */ 62#define _COMPONENT ACPI_BUS 63ACPI_MODULE_NAME("ACPI") 64 65static d_open_t acpiopen; 66static d_close_t acpiclose; 67static d_ioctl_t acpiioctl; 68 69static struct cdevsw acpi_cdevsw = { 70 .d_version = D_VERSION, 71 .d_flags = D_NEEDGIANT, 72 .d_open = acpiopen, 73 .d_close = acpiclose, 74 .d_ioctl = acpiioctl, 75 .d_name = "acpi", 76}; 77 78static const char* sleep_state_names[] = { 79 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 80 81/* this has to be static, as the softc is gone when we need it */ 82static int acpi_off_state = ACPI_STATE_S5; 83 84#if __FreeBSD_version >= 500000 85struct mtx acpi_mutex; 86#endif 87 88struct acpi_quirks { 89 char *OemId; 90 uint32_t OemRevision; 91 char *value; 92}; 93 94#define ACPI_OEM_REV_ANY 0 95 96static struct acpi_quirks acpi_quirks_table[] = { 97#ifdef notyet 98 /* Bad PCI routing table. Used on some SuperMicro boards. */ 99 { "PTLTD ", 0x06040000, "pci_link" }, 100#endif 101 102 { NULL, 0, NULL } 103}; 104 105static int acpi_modevent(struct module *mod, int event, void *junk); 106static void acpi_identify(driver_t *driver, device_t parent); 107static int acpi_probe(device_t dev); 108static int acpi_attach(device_t dev); 109static void acpi_quirks_set(void); 110static device_t acpi_add_child(device_t bus, int order, const char *name, 111 int unit); 112static int acpi_print_child(device_t bus, device_t child); 113static int acpi_read_ivar(device_t dev, device_t child, int index, 114 uintptr_t *result); 115static int acpi_write_ivar(device_t dev, device_t child, int index, 116 uintptr_t value); 117static int acpi_set_resource(device_t dev, device_t child, int type, 118 int rid, u_long start, u_long count); 119static int acpi_get_resource(device_t dev, device_t child, int type, 120 int rid, u_long *startp, u_long *countp); 121static struct resource *acpi_alloc_resource(device_t bus, device_t child, 122 int type, int *rid, u_long start, u_long end, 123 u_long count, u_int flags); 124static int acpi_release_resource(device_t bus, device_t child, int type, 125 int rid, struct resource *r); 126static uint32_t acpi_isa_get_logicalid(device_t dev); 127static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 128static int acpi_isa_pnp_probe(device_t bus, device_t child, 129 struct isa_pnp_id *ids); 130static void acpi_probe_children(device_t bus); 131static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 132 void *context, void **status); 133static void acpi_shutdown_pre_sync(void *arg, int howto); 134static void acpi_shutdown_final(void *arg, int howto); 135static void acpi_enable_fixed_events(struct acpi_softc *sc); 136static void acpi_system_eventhandler_sleep(void *arg, int state); 137static void acpi_system_eventhandler_wakeup(void *arg, int state); 138static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 139static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 140static int acpi_pm_func(u_long cmd, void *arg, ...); 141 142static device_method_t acpi_methods[] = { 143 /* Device interface */ 144 DEVMETHOD(device_identify, acpi_identify), 145 DEVMETHOD(device_probe, acpi_probe), 146 DEVMETHOD(device_attach, acpi_attach), 147 DEVMETHOD(device_detach, bus_generic_detach), 148 DEVMETHOD(device_shutdown, bus_generic_shutdown), 149 DEVMETHOD(device_suspend, bus_generic_suspend), 150 DEVMETHOD(device_resume, bus_generic_resume), 151 152 /* Bus interface */ 153 DEVMETHOD(bus_add_child, acpi_add_child), 154 DEVMETHOD(bus_print_child, acpi_print_child), 155 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 156 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 157 DEVMETHOD(bus_set_resource, acpi_set_resource), 158 DEVMETHOD(bus_get_resource, acpi_get_resource), 159 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 160 DEVMETHOD(bus_release_resource, acpi_release_resource), 161 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 162 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 163 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 164 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 165 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 166 167 /* ISA emulation */ 168 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 169 170 {0, 0} 171}; 172 173static driver_t acpi_driver = { 174 "acpi", 175 acpi_methods, 176 sizeof(struct acpi_softc), 177}; 178 179static devclass_t acpi_devclass; 180DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 181MODULE_VERSION(acpi, 100); 182 183SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RW, NULL, "ACPI debugging"); 184static char acpi_ca_version[12]; 185SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 186 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 187 188/* 189 * ACPI can only be loaded as a module by the loader; activating it after 190 * system bootstrap time is not useful, and can be fatal to the system. 191 * It also cannot be unloaded, since the entire system bus heirarchy hangs 192 * off it. 193 */ 194static int 195acpi_modevent(struct module *mod, int event, void *junk) 196{ 197 switch(event) { 198 case MOD_LOAD: 199 if (!cold) { 200 printf("The ACPI driver cannot be loaded after boot.\n"); 201 return (EPERM); 202 } 203 break; 204 case MOD_UNLOAD: 205 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 206 return (EBUSY); 207 break; 208 default: 209 break; 210 } 211 return (0); 212} 213 214/* 215 * Perform early initialization. 216 */ 217ACPI_STATUS 218acpi_Startup(void) 219{ 220#ifdef ACPI_DEBUGGER 221 char *debugpoint; 222#endif 223 static int error, started = 0; 224 225 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 226 227 if (started) 228 return_VALUE (error); 229 started = 1; 230 231#if __FreeBSD_version >= 500000 232 /* Initialise the ACPI mutex */ 233 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 234#endif 235 236 /* Start up the ACPI CA subsystem. */ 237#ifdef ACPI_DEBUGGER 238 debugpoint = getenv("debug.acpi.debugger"); 239 if (debugpoint) { 240 if (!strcmp(debugpoint, "init")) 241 acpi_EnterDebugger(); 242 freeenv(debugpoint); 243 } 244#endif 245 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 246 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 247 return_VALUE (error); 248 } 249#ifdef ACPI_DEBUGGER 250 debugpoint = getenv("debug.acpi.debugger"); 251 if (debugpoint) { 252 if (!strcmp(debugpoint, "tables")) 253 acpi_EnterDebugger(); 254 freeenv(debugpoint); 255 } 256#endif 257 258 if (ACPI_FAILURE(error = AcpiLoadTables())) { 259 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 260 return_VALUE(error); 261 } 262 263 /* Set up any quirks we have for this XSDT. */ 264 acpi_quirks_set(); 265 266 return_VALUE (AE_OK); 267} 268 269/* 270 * Detect ACPI, perform early initialisation 271 */ 272static void 273acpi_identify(driver_t *driver, device_t parent) 274{ 275 device_t child; 276 277 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 278 279 if (!cold) 280 return_VOID; 281 282 /* Check that we haven't been disabled with a hint. */ 283 if (resource_disabled("acpi", 0)) 284 return_VOID; 285 286 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "0x%x", 287 ACPI_CA_VERSION); 288 289 /* Make sure we're not being doubly invoked. */ 290 if (device_find_child(parent, "acpi", 0) != NULL) 291 return_VOID; 292 293 /* Initialize ACPI-CA. */ 294 if (ACPI_FAILURE(acpi_Startup())) 295 return_VOID; 296 297 /* Attach the actual ACPI device. */ 298 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 299 device_printf(parent, "ACPI: could not attach\n"); 300 return_VOID; 301 } 302} 303 304/* 305 * Fetch some descriptive data from ACPI to put in our attach message 306 */ 307static int 308acpi_probe(device_t dev) 309{ 310 ACPI_TABLE_HEADER th; 311 char buf[20]; 312 int error; 313 struct sbuf sb; 314 ACPI_STATUS status; 315 ACPI_LOCK_DECL; 316 317 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 318 319 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 320 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 321 322 device_printf(dev, "Other PM system enabled.\n"); 323 return_VALUE(ENXIO); 324 } 325 326 ACPI_LOCK; 327 328 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 329 device_printf(dev, "couldn't get XSDT header: %s\n", 330 AcpiFormatException(status)); 331 error = ENXIO; 332 } else { 333 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 334 sbuf_bcat(&sb, th.OemId, 6); 335 sbuf_trim(&sb); 336 sbuf_putc(&sb, ' '); 337 sbuf_bcat(&sb, th.OemTableId, 8); 338 sbuf_trim(&sb); 339 sbuf_finish(&sb); 340 device_set_desc_copy(dev, sbuf_data(&sb)); 341 sbuf_delete(&sb); 342 error = 0; 343 } 344 ACPI_UNLOCK; 345 return_VALUE(error); 346} 347 348static int 349acpi_attach(device_t dev) 350{ 351 struct acpi_softc *sc; 352 ACPI_STATUS status; 353 int error; 354 UINT32 flags; 355 char *env; 356#ifdef ACPI_DEBUGGER 357 char *debugpoint; 358#endif 359 ACPI_LOCK_DECL; 360 361 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 362 ACPI_LOCK; 363 sc = device_get_softc(dev); 364 bzero(sc, sizeof(*sc)); 365 sc->acpi_dev = dev; 366 367#ifdef ACPI_DEBUGGER 368 debugpoint = getenv("debug.acpi.debugger"); 369 if (debugpoint) { 370 if (!strcmp(debugpoint, "spaces")) 371 acpi_EnterDebugger(); 372 freeenv(debugpoint); 373 } 374#endif 375 376 /* Install the default address space handlers. */ 377 error = ENXIO; 378 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 379 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 380 if (ACPI_FAILURE(status)) { 381 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 382 AcpiFormatException(status)); 383 goto out; 384 } 385 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 386 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 387 if (ACPI_FAILURE(status)) { 388 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 389 AcpiFormatException(status)); 390 goto out; 391 } 392 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 393 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 394 if (ACPI_FAILURE(status)) { 395 device_printf(dev, "could not initialise PciConfig handler: %s\n", 396 AcpiFormatException(status)); 397 goto out; 398 } 399 400 /* 401 * Bring ACPI fully online. 402 * 403 * Note that some systems (specifically, those with namespace evaluation 404 * issues that require the avoidance of parts of the namespace) must 405 * avoid running _INI and _STA on everything, as well as dodging the final 406 * object init pass. 407 * 408 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 409 * 410 * XXX We should arrange for the object init pass after we have attached 411 * all our child devices, but on many systems it works here. 412 */ 413#ifdef ACPI_DEBUGGER 414 debugpoint = getenv("debug.acpi.debugger"); 415 if (debugpoint) { 416 if (!strcmp(debugpoint, "enable")) 417 acpi_EnterDebugger(); 418 freeenv(debugpoint); 419 } 420#endif 421 flags = 0; 422 if (testenv("debug.acpi.avoid")) 423 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 424 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 425 device_printf(dev, "Could not enable ACPI: %s\n", 426 AcpiFormatException(status)); 427 goto out; 428 } 429 430 /* 431 * Call the ECDT probe function to provide EC functionality before 432 * the namespace has been evaluated. 433 */ 434 acpi_ec_ecdt_probe(dev); 435 436 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 437 device_printf(dev, "Could not initialize ACPI objects: %s\n", 438 AcpiFormatException(status)); 439 goto out; 440 } 441 442 /* 443 * Setup our sysctl tree. 444 * 445 * XXX: This doesn't check to make sure that none of these fail. 446 */ 447 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 448 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 449 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 450 device_get_name(dev), CTLFLAG_RD, 0, ""); 451 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 452 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 453 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 454 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 455 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 456 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 457 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 458 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 459 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 460 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 461 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 462 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 463 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 464 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 465 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 466 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 467 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 468 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 469 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 470 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 471 &sc->acpi_sleep_delay, 0, "sleep delay"); 472 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 473 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 474 &sc->acpi_s4bios, 0, "S4BIOS mode"); 475 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 476 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 477 &sc->acpi_verbose, 0, "verbose mode"); 478 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 479 OID_AUTO, "disable_on_poweroff", CTLFLAG_RD | CTLFLAG_RW, 480 &sc->acpi_disable_on_poweroff, 0, "ACPI subsystem disable on poweroff"); 481 482 /* 483 * Default to 5 seconds before sleeping to give some machines time to 484 * stabilize. 485 */ 486 sc->acpi_sleep_delay = 5; 487 sc->acpi_disable_on_poweroff = 1; 488 if (bootverbose) 489 sc->acpi_verbose = 1; 490 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) { 491 sc->acpi_verbose = 1; 492 freeenv(env); 493 } 494 495 /* Only enable S4BIOS by default if the FACS says it is available. */ 496 if (AcpiGbl_FACS->S4Bios_f != 0) 497 sc->acpi_s4bios = 1; 498 499 /* 500 * Dispatch the default sleep state to devices. 501 * TBD: should be configured from userland policy manager. 502 */ 503 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 504 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 505 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 506 sc->acpi_standby_sx = ACPI_STATE_S1; 507 sc->acpi_suspend_sx = ACPI_STATE_S3; 508 509 acpi_enable_fixed_events(sc); 510 511 /* 512 * Scan the namespace and attach/initialise children. 513 */ 514#ifdef ACPI_DEBUGGER 515 debugpoint = getenv("debug.acpi.debugger"); 516 if (debugpoint) { 517 if (!strcmp(debugpoint, "probe")) 518 acpi_EnterDebugger(); 519 freeenv(debugpoint); 520 } 521#endif 522 523 /* Register our shutdown handlers */ 524 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, 525 SHUTDOWN_PRI_LAST); 526 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 527 SHUTDOWN_PRI_LAST); 528 529 /* 530 * Register our acpi event handlers. 531 * XXX should be configurable eg. via userland policy manager. 532 */ 533 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 534 sc, ACPI_EVENT_PRI_LAST); 535 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 536 sc, ACPI_EVENT_PRI_LAST); 537 538 /* Flag our initial states. */ 539 sc->acpi_enabled = 1; 540 sc->acpi_sstate = ACPI_STATE_S0; 541 sc->acpi_sleep_disabled = 0; 542 543 /* Create the control device */ 544 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 545 "acpi"); 546 sc->acpi_dev_t->si_drv1 = sc; 547 548#ifdef ACPI_DEBUGGER 549 debugpoint = getenv("debug.acpi.debugger"); 550 if (debugpoint) { 551 if (strcmp(debugpoint, "running") == 0) 552 acpi_EnterDebugger(); 553 freeenv(debugpoint); 554 } 555#endif 556 557#ifdef ACPI_USE_THREADS 558 if ((error = acpi_task_thread_init())) 559 goto out; 560#endif 561 562 if ((error = acpi_machdep_init(dev))) 563 goto out; 564 565 /* Register ACPI again to pass the correct argument of pm_func. */ 566 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 567 568 if (!acpi_disabled("bus")) 569 acpi_probe_children(dev); 570 571 error = 0; 572 573 out: 574 ACPI_UNLOCK; 575 return_VALUE (error); 576} 577 578static void 579acpi_quirks_set() 580{ 581 XSDT_DESCRIPTOR *xsdt; 582 struct acpi_quirks *quirk; 583 char *env, *tmp; 584 int len; 585 586 /* If the user specifies "noquirks", leave the settings alone. */ 587 len = 0; 588 if ((env = getenv("debug.acpi.disabled")) != NULL) { 589 if (strstr("noquirks", env) != NULL) 590 goto out; 591 len = strlen(env); 592 } 593 594 /* 595 * Search through our quirk table and concatenate the disabled 596 * values with whatever we find. 597 */ 598 xsdt = AcpiGbl_XSDT; 599 for (quirk = acpi_quirks_table; quirk->OemId; quirk++) { 600 if (!strncmp(xsdt->OemId, quirk->OemId, strlen(quirk->OemId)) && 601 (xsdt->OemRevision == quirk->OemRevision || 602 quirk->OemRevision == ACPI_OEM_REV_ANY)) { 603 len += strlen(quirk->value) + 2; 604 if ((tmp = malloc(len, M_TEMP, M_NOWAIT)) == NULL) 605 goto out; 606 sprintf(tmp, "%s %s", env ? env : "", quirk->value); 607 setenv("debug.acpi.disabled", tmp); 608 free(tmp, M_TEMP); 609 break; 610 } 611 } 612 613out: 614 if (env) 615 freeenv(env); 616} 617 618/* 619 * Handle a new device being added 620 */ 621static device_t 622acpi_add_child(device_t bus, int order, const char *name, int unit) 623{ 624 struct acpi_device *ad; 625 device_t child; 626 627 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 628 return (NULL); 629 630 resource_list_init(&ad->ad_rl); 631 632 child = device_add_child_ordered(bus, order, name, unit); 633 if (child != NULL) 634 device_set_ivars(child, ad); 635 return (child); 636} 637 638static int 639acpi_print_child(device_t bus, device_t child) 640{ 641 struct acpi_device *adev = device_get_ivars(child); 642 struct resource_list *rl = &adev->ad_rl; 643 int retval = 0; 644 645 retval += bus_print_child_header(bus, child); 646 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 647 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 648 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 649 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 650 retval += bus_print_child_footer(bus, child); 651 652 return (retval); 653} 654 655/* 656 * Handle per-device ivars 657 */ 658static int 659acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 660{ 661 struct acpi_device *ad; 662 663 if ((ad = device_get_ivars(child)) == NULL) { 664 printf("device has no ivars\n"); 665 return (ENOENT); 666 } 667 668 /* ACPI and ISA compatibility ivars */ 669 switch(index) { 670 case ACPI_IVAR_HANDLE: 671 *(ACPI_HANDLE *)result = ad->ad_handle; 672 break; 673 case ACPI_IVAR_MAGIC: 674 *(int *)result = ad->ad_magic; 675 break; 676 case ACPI_IVAR_PRIVATE: 677 *(void **)result = ad->ad_private; 678 break; 679 case ISA_IVAR_VENDORID: 680 case ISA_IVAR_SERIAL: 681 case ISA_IVAR_COMPATID: 682 *(int *)result = -1; 683 break; 684 case ISA_IVAR_LOGICALID: 685 *(int *)result = acpi_isa_get_logicalid(child); 686 break; 687 default: 688 return (ENOENT); 689 } 690 691 return (0); 692} 693 694static int 695acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 696{ 697 struct acpi_device *ad; 698 699 if ((ad = device_get_ivars(child)) == NULL) { 700 printf("device has no ivars\n"); 701 return (ENOENT); 702 } 703 704 switch(index) { 705 case ACPI_IVAR_HANDLE: 706 ad->ad_handle = (ACPI_HANDLE)value; 707 break; 708 case ACPI_IVAR_MAGIC: 709 ad->ad_magic = (int)value; 710 break; 711 case ACPI_IVAR_PRIVATE: 712 ad->ad_private = (void *)value; 713 break; 714 default: 715 panic("bad ivar write request (%d)", index); 716 return (ENOENT); 717 } 718 719 return (0); 720} 721 722ACPI_HANDLE 723acpi_get_handle(device_t dev) 724{ 725 uintptr_t up; 726 ACPI_HANDLE h; 727 728 if (BUS_READ_IVAR(device_get_parent(dev), dev, ACPI_IVAR_HANDLE, &up)) 729 return(NULL); 730 h = (ACPI_HANDLE)up; 731 return (h); 732} 733 734int 735acpi_set_handle(device_t dev, ACPI_HANDLE h) 736{ 737 uintptr_t up; 738 739 up = (uintptr_t)h; 740 return (BUS_WRITE_IVAR(device_get_parent(dev), dev, ACPI_IVAR_HANDLE, up)); 741} 742 743int 744acpi_get_magic(device_t dev) 745{ 746 uintptr_t up; 747 int m; 748 749 if (BUS_READ_IVAR(device_get_parent(dev), dev, ACPI_IVAR_MAGIC, &up)) 750 return(0); 751 m = (int)up; 752 return (m); 753} 754 755int 756acpi_set_magic(device_t dev, int m) 757{ 758 uintptr_t up; 759 760 up = (uintptr_t)m; 761 return (BUS_WRITE_IVAR(device_get_parent(dev), dev, ACPI_IVAR_MAGIC, up)); 762} 763 764void * 765acpi_get_private(device_t dev) 766{ 767 uintptr_t up; 768 void *p; 769 770 if (BUS_READ_IVAR(device_get_parent(dev), dev, ACPI_IVAR_PRIVATE, &up)) 771 return (NULL); 772 p = (void *)up; 773 return (p); 774} 775 776int 777acpi_set_private(device_t dev, void *p) 778{ 779 uintptr_t up; 780 781 up = (uintptr_t)p; 782 return (BUS_WRITE_IVAR(device_get_parent(dev), dev, ACPI_IVAR_PRIVATE, up)); 783} 784 785ACPI_OBJECT_TYPE 786acpi_get_type(device_t dev) 787{ 788 ACPI_HANDLE h; 789 ACPI_OBJECT_TYPE t; 790 791 if ((h = acpi_get_handle(dev)) == NULL) 792 return (ACPI_TYPE_NOT_FOUND); 793 if (AcpiGetType(h, &t) != AE_OK) 794 return (ACPI_TYPE_NOT_FOUND); 795 return (t); 796} 797 798/* 799 * Handle child resource allocation/removal 800 */ 801static int 802acpi_set_resource(device_t dev, device_t child, int type, int rid, 803 u_long start, u_long count) 804{ 805 struct acpi_device *ad = device_get_ivars(child); 806 struct resource_list *rl = &ad->ad_rl; 807 808 resource_list_add(rl, type, rid, start, start + count -1, count); 809 810 return(0); 811} 812 813static int 814acpi_get_resource(device_t dev, device_t child, int type, int rid, 815 u_long *startp, u_long *countp) 816{ 817 struct acpi_device *ad = device_get_ivars(child); 818 struct resource_list *rl = &ad->ad_rl; 819 struct resource_list_entry *rle; 820 821 rle = resource_list_find(rl, type, rid); 822 if (!rle) 823 return(ENOENT); 824 825 if (startp) 826 *startp = rle->start; 827 if (countp) 828 *countp = rle->count; 829 830 return (0); 831} 832 833static struct resource * 834acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 835 u_long start, u_long end, u_long count, u_int flags) 836{ 837 struct acpi_device *ad = device_get_ivars(child); 838 struct resource_list *rl = &ad->ad_rl; 839 840 return (resource_list_alloc(rl, bus, child, type, rid, start, end, count, 841 flags)); 842} 843 844static int 845acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 846{ 847 struct acpi_device *ad = device_get_ivars(child); 848 struct resource_list *rl = &ad->ad_rl; 849 850 return (resource_list_release(rl, bus, child, type, rid, r)); 851} 852 853/* Allocate an IO port or memory resource, given its GAS. */ 854struct resource * 855acpi_bus_alloc_gas(device_t dev, int *rid, ACPI_GENERIC_ADDRESS *gas) 856{ 857 int type; 858 859 if (gas == NULL || !ACPI_VALID_ADDRESS(gas->Address) || 860 gas->RegisterBitWidth < 8) 861 return (NULL); 862 863 switch (gas->AddressSpaceId) { 864 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 865 type = SYS_RES_MEMORY; 866 break; 867 case ACPI_ADR_SPACE_SYSTEM_IO: 868 type = SYS_RES_IOPORT; 869 break; 870 default: 871 return (NULL); 872 } 873 874 bus_set_resource(dev, type, *rid, gas->Address, gas->RegisterBitWidth / 8); 875 return (bus_alloc_resource(dev, type, rid, 0, ~0, 1, RF_ACTIVE)); 876} 877 878/* 879 * Handle ISA-like devices probing for a PnP ID to match. 880 */ 881#define PNP_EISAID(s) \ 882 ((((s[0] - '@') & 0x1f) << 2) \ 883 | (((s[1] - '@') & 0x18) >> 3) \ 884 | (((s[1] - '@') & 0x07) << 13) \ 885 | (((s[2] - '@') & 0x1f) << 8) \ 886 | (PNP_HEXTONUM(s[4]) << 16) \ 887 | (PNP_HEXTONUM(s[3]) << 20) \ 888 | (PNP_HEXTONUM(s[6]) << 24) \ 889 | (PNP_HEXTONUM(s[5]) << 28)) 890 891static uint32_t 892acpi_isa_get_logicalid(device_t dev) 893{ 894 ACPI_DEVICE_INFO *devinfo; 895 ACPI_BUFFER buf; 896 ACPI_HANDLE h; 897 ACPI_STATUS error; 898 u_int32_t pnpid; 899 ACPI_LOCK_DECL; 900 901 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 902 903 pnpid = 0; 904 buf.Pointer = NULL; 905 buf.Length = ACPI_ALLOCATE_BUFFER; 906 907 ACPI_LOCK; 908 909 /* Fetch and validate the HID. */ 910 if ((h = acpi_get_handle(dev)) == NULL) 911 goto out; 912 error = AcpiGetObjectInfo(h, &buf); 913 if (ACPI_FAILURE(error)) 914 goto out; 915 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 916 917 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 918 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 919 920out: 921 if (buf.Pointer != NULL) 922 AcpiOsFree(buf.Pointer); 923 ACPI_UNLOCK; 924 return_VALUE (pnpid); 925} 926 927static int 928acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 929{ 930 ACPI_DEVICE_INFO *devinfo; 931 ACPI_BUFFER buf; 932 ACPI_HANDLE h; 933 ACPI_STATUS error; 934 uint32_t *pnpid; 935 int valid, i; 936 ACPI_LOCK_DECL; 937 938 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 939 940 pnpid = cids; 941 valid = 0; 942 buf.Pointer = NULL; 943 buf.Length = ACPI_ALLOCATE_BUFFER; 944 945 ACPI_LOCK; 946 947 /* Fetch and validate the CID */ 948 if ((h = acpi_get_handle(dev)) == NULL) 949 goto out; 950 error = AcpiGetObjectInfo(h, &buf); 951 if (ACPI_FAILURE(error)) 952 goto out; 953 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 954 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 955 goto out; 956 957 if (devinfo->CompatibilityId.Count < count) 958 count = devinfo->CompatibilityId.Count; 959 for (i = 0; i < count; i++) { 960 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 961 continue; 962 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 963 valid++; 964 } 965 966out: 967 if (buf.Pointer != NULL) 968 AcpiOsFree(buf.Pointer); 969 ACPI_UNLOCK; 970 return_VALUE (valid); 971} 972 973static int 974acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 975{ 976 int result, cid_count, i; 977 uint32_t lid, cids[8]; 978 979 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 980 981 /* 982 * ISA-style drivers attached to ACPI may persist and 983 * probe manually if we return ENOENT. We never want 984 * that to happen, so don't ever return it. 985 */ 986 result = ENXIO; 987 988 /* Scan the supplied IDs for a match */ 989 lid = acpi_isa_get_logicalid(child); 990 cid_count = acpi_isa_get_compatid(child, cids, 8); 991 while (ids && ids->ip_id) { 992 if (lid == ids->ip_id) { 993 result = 0; 994 goto out; 995 } 996 for (i = 0; i < cid_count; i++) { 997 if (cids[i] == ids->ip_id) { 998 result = 0; 999 goto out; 1000 } 1001 } 1002 ids++; 1003 } 1004 1005 out: 1006 return_VALUE (result); 1007} 1008 1009/* 1010 * Scan relevant portions of the ACPI namespace and attach child devices. 1011 * 1012 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and 1013 * \_SB_ scopes, and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 1014 */ 1015static void 1016acpi_probe_children(device_t bus) 1017{ 1018 ACPI_HANDLE parent; 1019 ACPI_STATUS status; 1020 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 1021 int i; 1022 1023 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1024 ACPI_ASSERTLOCK; 1025 1026 /* Create any static children by calling device identify methods. */ 1027 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1028 bus_generic_probe(bus); 1029 1030 /* 1031 * Scan the namespace and insert placeholders for all the devices that 1032 * we find. 1033 * 1034 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1035 * we want to create nodes for all devices, not just those that are 1036 * currently present. (This assumes that we don't want to create/remove 1037 * devices as they appear, which might be smarter.) 1038 */ 1039 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1040 for (i = 0; scopes[i] != NULL; i++) { 1041 status = AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent); 1042 if (ACPI_SUCCESS(status)) { 1043 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, 1044 bus, NULL); 1045 } 1046 } 1047 1048 /* 1049 * Scan all of the child devices we have created and let them probe/attach. 1050 */ 1051 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1052 bus_generic_attach(bus); 1053 1054 /* 1055 * Some of these children may have attached others as part of their attach 1056 * process (eg. the root PCI bus driver), so rescan. 1057 */ 1058 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1059 bus_generic_attach(bus); 1060 1061 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1062 return_VOID; 1063} 1064 1065/* 1066 * Evaluate a child device and determine whether we might attach a device to 1067 * it. 1068 */ 1069static ACPI_STATUS 1070acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1071{ 1072 ACPI_OBJECT_TYPE type; 1073 device_t child, bus = (device_t)context; 1074 1075 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1076 1077 /* Skip this device if we think we'll have trouble with it. */ 1078 if (acpi_avoid(handle)) 1079 return_ACPI_STATUS (AE_OK); 1080 1081 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1082 switch(type) { 1083 case ACPI_TYPE_DEVICE: 1084 case ACPI_TYPE_PROCESSOR: 1085 case ACPI_TYPE_THERMAL: 1086 case ACPI_TYPE_POWER: 1087 if (acpi_disabled("children")) 1088 break; 1089 1090 /* 1091 * Create a placeholder device for this node. Sort the placeholder 1092 * so that the probe/attach passes will run breadth-first. 1093 */ 1094 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", 1095 acpi_name(handle))); 1096 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 1097 if (child == NULL) 1098 break; 1099 acpi_set_handle(child, handle); 1100 1101 /* 1102 * Check that the device is present. If it's not present, 1103 * leave it disabled (so that we have a device_t attached to 1104 * the handle, but we don't probe it). 1105 */ 1106 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1107 device_disable(child); 1108 break; 1109 } 1110 1111 /* 1112 * Get the device's resource settings and attach them. 1113 * Note that if the device has _PRS but no _CRS, we need 1114 * to decide when it's appropriate to try to configure the 1115 * device. Ignore the return value here; it's OK for the 1116 * device not to have any resources. 1117 */ 1118 acpi_parse_resources(child, handle, &acpi_res_parse_set); 1119 1120 /* If we're debugging, probe/attach now rather than later */ 1121 ACPI_DEBUG_EXEC(device_probe_and_attach(child)); 1122 break; 1123 } 1124 } 1125 1126 return_ACPI_STATUS (AE_OK); 1127} 1128 1129static void 1130acpi_shutdown_pre_sync(void *arg, int howto) 1131{ 1132 struct acpi_softc *sc = arg; 1133 1134 ACPI_ASSERTLOCK; 1135 1136 /* 1137 * Disable all ACPI events before soft off, otherwise the system 1138 * will be turned on again on some laptops. 1139 * 1140 * XXX this should probably be restricted to masking some events just 1141 * before powering down, since we may still need ACPI during the 1142 * shutdown process. 1143 */ 1144 if (sc->acpi_disable_on_poweroff) 1145 acpi_Disable(sc); 1146} 1147 1148static void 1149acpi_shutdown_final(void *arg, int howto) 1150{ 1151 ACPI_STATUS status; 1152 1153 ACPI_ASSERTLOCK; 1154 1155 if ((howto & RB_POWEROFF) != 0) { 1156 printf("Powering system off using ACPI\n"); 1157 status = AcpiEnterSleepStatePrep(acpi_off_state); 1158 if (ACPI_FAILURE(status)) { 1159 printf("AcpiEnterSleepStatePrep failed - %s\n", 1160 AcpiFormatException(status)); 1161 return; 1162 } 1163 ACPI_DISABLE_IRQS(); 1164 status = AcpiEnterSleepState(acpi_off_state); 1165 if (ACPI_FAILURE(status)) { 1166 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1167 } else { 1168 DELAY(1000000); 1169 printf("ACPI power-off failed - timeout\n"); 1170 } 1171 } else { 1172 printf("Shutting down ACPI\n"); 1173 AcpiTerminate(); 1174 } 1175} 1176 1177static void 1178acpi_enable_fixed_events(struct acpi_softc *sc) 1179{ 1180 static int first_time = 1; 1181 1182 ACPI_ASSERTLOCK; 1183 1184 /* Enable and clear fixed events and install handlers. */ 1185 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 1186 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1187 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1188 acpi_event_power_button_sleep, sc); 1189 if (first_time) 1190 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1191 } 1192 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 1193 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1194 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1195 acpi_event_sleep_button_sleep, sc); 1196 if (first_time) 1197 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1198 } 1199 1200 first_time = 0; 1201} 1202 1203/* 1204 * Returns true if the device is actually present and should 1205 * be attached to. This requires the present, enabled, UI-visible 1206 * and diagnostics-passed bits to be set. 1207 */ 1208BOOLEAN 1209acpi_DeviceIsPresent(device_t dev) 1210{ 1211 ACPI_DEVICE_INFO *devinfo; 1212 ACPI_HANDLE h; 1213 ACPI_BUFFER buf; 1214 ACPI_STATUS error; 1215 int ret; 1216 1217 ACPI_ASSERTLOCK; 1218 1219 ret = FALSE; 1220 if ((h = acpi_get_handle(dev)) == NULL) 1221 return (FALSE); 1222 buf.Pointer = NULL; 1223 buf.Length = ACPI_ALLOCATE_BUFFER; 1224 error = AcpiGetObjectInfo(h, &buf); 1225 if (ACPI_FAILURE(error)) 1226 return (FALSE); 1227 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1228 1229 /* If no _STA method, must be present */ 1230 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1231 ret = TRUE; 1232 1233 /* Return true for 'present' and 'functioning' */ 1234 if ((devinfo->CurrentStatus & 0x9) == 0x9) 1235 ret = TRUE; 1236 1237 AcpiOsFree(buf.Pointer); 1238 return (ret); 1239} 1240 1241/* 1242 * Returns true if the battery is actually present and inserted. 1243 */ 1244BOOLEAN 1245acpi_BatteryIsPresent(device_t dev) 1246{ 1247 ACPI_DEVICE_INFO *devinfo; 1248 ACPI_HANDLE h; 1249 ACPI_BUFFER buf; 1250 ACPI_STATUS error; 1251 int ret; 1252 1253 ACPI_ASSERTLOCK; 1254 1255 ret = FALSE; 1256 if ((h = acpi_get_handle(dev)) == NULL) 1257 return (FALSE); 1258 buf.Pointer = NULL; 1259 buf.Length = ACPI_ALLOCATE_BUFFER; 1260 error = AcpiGetObjectInfo(h, &buf); 1261 if (ACPI_FAILURE(error)) 1262 return (FALSE); 1263 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1264 1265 /* If no _STA method, must be present */ 1266 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1267 ret = TRUE; 1268 1269 /* Return true for 'present' and 'functioning' */ 1270 if ((devinfo->CurrentStatus & 0x19) == 0x19) 1271 ret = TRUE; 1272 1273 AcpiOsFree(buf.Pointer); 1274 return (ret); 1275} 1276 1277/* 1278 * Match a HID string against a device 1279 */ 1280BOOLEAN 1281acpi_MatchHid(device_t dev, char *hid) 1282{ 1283 ACPI_DEVICE_INFO *devinfo; 1284 ACPI_HANDLE h; 1285 ACPI_BUFFER buf; 1286 ACPI_STATUS error; 1287 int ret, i; 1288 1289 ACPI_ASSERTLOCK; 1290 1291 ret = FALSE; 1292 if (hid == NULL) 1293 return (FALSE); 1294 if ((h = acpi_get_handle(dev)) == NULL) 1295 return (FALSE); 1296 buf.Pointer = NULL; 1297 buf.Length = ACPI_ALLOCATE_BUFFER; 1298 error = AcpiGetObjectInfo(h, &buf); 1299 if (ACPI_FAILURE(error)) 1300 return (FALSE); 1301 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1302 1303 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1304 strcmp(hid, devinfo->HardwareId.Value) == 0) 1305 ret = TRUE; 1306 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1307 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1308 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1309 ret = TRUE; 1310 break; 1311 } 1312 } 1313 } 1314 1315 AcpiOsFree(buf.Pointer); 1316 return (ret); 1317} 1318 1319/* 1320 * Return the handle of a named object within our scope, ie. that of (parent) 1321 * or one if its parents. 1322 */ 1323ACPI_STATUS 1324acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1325{ 1326 ACPI_HANDLE r; 1327 ACPI_STATUS status; 1328 1329 ACPI_ASSERTLOCK; 1330 1331 /* Walk back up the tree to the root */ 1332 for (;;) { 1333 status = AcpiGetHandle(parent, path, &r); 1334 if (ACPI_SUCCESS(status)) { 1335 *result = r; 1336 return (AE_OK); 1337 } 1338 if (status != AE_NOT_FOUND) 1339 return (AE_OK); 1340 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1341 return (AE_NOT_FOUND); 1342 parent = r; 1343 } 1344} 1345 1346/* 1347 * Allocate a buffer with a preset data size. 1348 */ 1349ACPI_BUFFER * 1350acpi_AllocBuffer(int size) 1351{ 1352 ACPI_BUFFER *buf; 1353 1354 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1355 return (NULL); 1356 buf->Length = size; 1357 buf->Pointer = (void *)(buf + 1); 1358 return (buf); 1359} 1360 1361/* 1362 * Evaluate a path that should return an integer. 1363 */ 1364ACPI_STATUS 1365acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number) 1366{ 1367 ACPI_STATUS status; 1368 ACPI_BUFFER buf; 1369 ACPI_OBJECT param; 1370 1371 ACPI_ASSERTLOCK; 1372 1373 if (handle == NULL) 1374 handle = ACPI_ROOT_OBJECT; 1375 1376 /* 1377 * Assume that what we've been pointed at is an Integer object, or 1378 * a method that will return an Integer. 1379 */ 1380 buf.Pointer = ¶m; 1381 buf.Length = sizeof(param); 1382 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1383 if (ACPI_SUCCESS(status)) { 1384 if (param.Type == ACPI_TYPE_INTEGER) 1385 *number = param.Integer.Value; 1386 else 1387 status = AE_TYPE; 1388 } 1389 1390 /* 1391 * In some applications, a method that's expected to return an Integer 1392 * may instead return a Buffer (probably to simplify some internal 1393 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1394 * convert it into an Integer as best we can. 1395 * 1396 * This is a hack. 1397 */ 1398 if (status == AE_BUFFER_OVERFLOW) { 1399 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1400 status = AE_NO_MEMORY; 1401 } else { 1402 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1403 if (ACPI_SUCCESS(status)) 1404 status = acpi_ConvertBufferToInteger(&buf, number); 1405 AcpiOsFree(buf.Pointer); 1406 } 1407 } 1408 return (status); 1409} 1410 1411ACPI_STATUS 1412acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, int *number) 1413{ 1414 ACPI_OBJECT *p; 1415 int i; 1416 1417 p = (ACPI_OBJECT *)bufp->Pointer; 1418 if (p->Type == ACPI_TYPE_INTEGER) { 1419 *number = p->Integer.Value; 1420 return (AE_OK); 1421 } 1422 if (p->Type != ACPI_TYPE_BUFFER) 1423 return (AE_TYPE); 1424 if (p->Buffer.Length > sizeof(int)) 1425 return (AE_BAD_DATA); 1426 1427 *number = 0; 1428 for (i = 0; i < p->Buffer.Length; i++) 1429 *number += (*(p->Buffer.Pointer + i) << (i * 8)); 1430 return (AE_OK); 1431} 1432 1433/* 1434 * Iterate over the elements of an a package object, calling the supplied 1435 * function for each element. 1436 * 1437 * XXX possible enhancement might be to abort traversal on error. 1438 */ 1439ACPI_STATUS 1440acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1441 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1442{ 1443 ACPI_OBJECT *comp; 1444 int i; 1445 1446 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1447 return (AE_BAD_PARAMETER); 1448 1449 /* Iterate over components */ 1450 i = 0; 1451 comp = pkg->Package.Elements; 1452 for (; i < pkg->Package.Count; i++, comp++) 1453 func(comp, arg); 1454 1455 return (AE_OK); 1456} 1457 1458/* 1459 * Find the (index)th resource object in a set. 1460 */ 1461ACPI_STATUS 1462acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1463{ 1464 ACPI_RESOURCE *rp; 1465 int i; 1466 1467 rp = (ACPI_RESOURCE *)buf->Pointer; 1468 i = index; 1469 while (i-- > 0) { 1470 /* Range check */ 1471 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1472 return (AE_BAD_PARAMETER); 1473 1474 /* Check for terminator */ 1475 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1476 return (AE_NOT_FOUND); 1477 rp = ACPI_NEXT_RESOURCE(rp); 1478 } 1479 if (resp != NULL) 1480 *resp = rp; 1481 1482 return (AE_OK); 1483} 1484 1485/* 1486 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1487 * 1488 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1489 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1490 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1491 * resources. 1492 */ 1493#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1494 1495ACPI_STATUS 1496acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1497{ 1498 ACPI_RESOURCE *rp; 1499 void *newp; 1500 1501 /* Initialise the buffer if necessary. */ 1502 if (buf->Pointer == NULL) { 1503 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1504 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1505 return (AE_NO_MEMORY); 1506 rp = (ACPI_RESOURCE *)buf->Pointer; 1507 rp->Id = ACPI_RSTYPE_END_TAG; 1508 rp->Length = 0; 1509 } 1510 if (res == NULL) 1511 return (AE_OK); 1512 1513 /* 1514 * Scan the current buffer looking for the terminator. 1515 * This will either find the terminator or hit the end 1516 * of the buffer and return an error. 1517 */ 1518 rp = (ACPI_RESOURCE *)buf->Pointer; 1519 for (;;) { 1520 /* Range check, don't go outside the buffer */ 1521 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1522 return (AE_BAD_PARAMETER); 1523 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1524 break; 1525 rp = ACPI_NEXT_RESOURCE(rp); 1526 } 1527 1528 /* 1529 * Check the size of the buffer and expand if required. 1530 * 1531 * Required size is: 1532 * size of existing resources before terminator + 1533 * size of new resource and header + 1534 * size of terminator. 1535 * 1536 * Note that this loop should really only run once, unless 1537 * for some reason we are stuffing a *really* huge resource. 1538 */ 1539 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1540 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1541 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1542 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1543 return (AE_NO_MEMORY); 1544 bcopy(buf->Pointer, newp, buf->Length); 1545 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1546 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1547 AcpiOsFree(buf->Pointer); 1548 buf->Pointer = newp; 1549 buf->Length += buf->Length; 1550 } 1551 1552 /* Insert the new resource. */ 1553 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1554 1555 /* And add the terminator. */ 1556 rp = ACPI_NEXT_RESOURCE(rp); 1557 rp->Id = ACPI_RSTYPE_END_TAG; 1558 rp->Length = 0; 1559 1560 return (AE_OK); 1561} 1562 1563/* 1564 * Set interrupt model. 1565 */ 1566ACPI_STATUS 1567acpi_SetIntrModel(int model) 1568{ 1569 ACPI_OBJECT_LIST ArgList; 1570 ACPI_OBJECT Arg; 1571 1572 Arg.Type = ACPI_TYPE_INTEGER; 1573 Arg.Integer.Value = model; 1574 ArgList.Count = 1; 1575 ArgList.Pointer = &Arg; 1576 return (AcpiEvaluateObject(ACPI_ROOT_OBJECT, "_PIC", &ArgList, NULL)); 1577} 1578 1579#define ACPI_MINIMUM_AWAKETIME 5 1580 1581static void 1582acpi_sleep_enable(void *arg) 1583{ 1584 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 1585} 1586 1587/* 1588 * Set the system sleep state 1589 * 1590 * Currently we support S1-S5 but S4 is only S4BIOS 1591 */ 1592ACPI_STATUS 1593acpi_SetSleepState(struct acpi_softc *sc, int state) 1594{ 1595 ACPI_STATUS status = AE_OK; 1596 UINT8 TypeA; 1597 UINT8 TypeB; 1598 1599 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1600 ACPI_ASSERTLOCK; 1601 1602 /* Avoid reentry if already attempting to suspend. */ 1603 if (sc->acpi_sstate != ACPI_STATE_S0) 1604 return_ACPI_STATUS (AE_BAD_PARAMETER); 1605 1606 /* We recently woke up so don't suspend again for a while. */ 1607 if (sc->acpi_sleep_disabled) 1608 return_ACPI_STATUS (AE_OK); 1609 1610 switch (state) { 1611 case ACPI_STATE_S1: 1612 case ACPI_STATE_S2: 1613 case ACPI_STATE_S3: 1614 case ACPI_STATE_S4: 1615 status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB); 1616 if (status == AE_NOT_FOUND) { 1617 device_printf(sc->acpi_dev, 1618 "Sleep state S%d not supported by BIOS\n", state); 1619 break; 1620 } else if (ACPI_FAILURE(status)) { 1621 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 1622 AcpiFormatException(status)); 1623 break; 1624 } 1625 1626 sc->acpi_sstate = state; 1627 sc->acpi_sleep_disabled = 1; 1628 1629 /* Inform all devices that we are going to sleep. */ 1630 if (DEVICE_SUSPEND(root_bus) != 0) { 1631 /* 1632 * Re-wake the system. 1633 * 1634 * XXX note that a better two-pass approach with a 'veto' pass 1635 * followed by a "real thing" pass would be better, but the 1636 * current bus interface does not provide for this. 1637 */ 1638 DEVICE_RESUME(root_bus); 1639 return_ACPI_STATUS (AE_ERROR); 1640 } 1641 1642 status = AcpiEnterSleepStatePrep(state); 1643 if (ACPI_FAILURE(status)) { 1644 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1645 AcpiFormatException(status)); 1646 break; 1647 } 1648 1649 if (sc->acpi_sleep_delay > 0) 1650 DELAY(sc->acpi_sleep_delay * 1000000); 1651 1652 if (state != ACPI_STATE_S1) { 1653 acpi_sleep_machdep(sc, state); 1654 1655 /* AcpiEnterSleepState() may be incomplete, unlock if locked. */ 1656 if (AcpiGbl_MutexInfo[ACPI_MTX_HARDWARE].OwnerId != 1657 ACPI_MUTEX_NOT_ACQUIRED) { 1658 1659 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1660 } 1661 1662 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1663 if (state == ACPI_STATE_S4) 1664 AcpiEnable(); 1665 } else { 1666 status = AcpiEnterSleepState((UINT8)state); 1667 if (ACPI_FAILURE(status)) { 1668 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 1669 AcpiFormatException(status)); 1670 break; 1671 } 1672 } 1673 AcpiLeaveSleepState((UINT8)state); 1674 DEVICE_RESUME(root_bus); 1675 sc->acpi_sstate = ACPI_STATE_S0; 1676 acpi_enable_fixed_events(sc); 1677 break; 1678 case ACPI_STATE_S5: 1679 /* 1680 * Shut down cleanly and power off. This will call us back through the 1681 * shutdown handlers. 1682 */ 1683 shutdown_nice(RB_POWEROFF); 1684 break; 1685 case ACPI_STATE_S0: 1686 default: 1687 status = AE_BAD_PARAMETER; 1688 break; 1689 } 1690 1691 /* Disable a second sleep request for a short period */ 1692 if (sc->acpi_sleep_disabled) 1693 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 1694 1695 return_ACPI_STATUS (status); 1696} 1697 1698/* 1699 * Enable/Disable ACPI 1700 */ 1701ACPI_STATUS 1702acpi_Enable(struct acpi_softc *sc) 1703{ 1704 ACPI_STATUS status; 1705 u_int32_t flags; 1706 1707 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1708 ACPI_ASSERTLOCK; 1709 1710 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 1711 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 1712 if (!sc->acpi_enabled) 1713 status = AcpiEnableSubsystem(flags); 1714 else 1715 status = AE_OK; 1716 1717 if (status == AE_OK) 1718 sc->acpi_enabled = 1; 1719 1720 return_ACPI_STATUS (status); 1721} 1722 1723ACPI_STATUS 1724acpi_Disable(struct acpi_softc *sc) 1725{ 1726 ACPI_STATUS status; 1727 1728 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1729 ACPI_ASSERTLOCK; 1730 1731 if (sc->acpi_enabled) 1732 status = AcpiDisable(); 1733 else 1734 status = AE_OK; 1735 1736 if (status == AE_OK) 1737 sc->acpi_enabled = 0; 1738 1739 return_ACPI_STATUS (status); 1740} 1741 1742/* 1743 * ACPI Event Handlers 1744 */ 1745 1746/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1747 1748static void 1749acpi_system_eventhandler_sleep(void *arg, int state) 1750{ 1751 ACPI_LOCK_DECL; 1752 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1753 1754 ACPI_LOCK; 1755 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 1756 acpi_SetSleepState((struct acpi_softc *)arg, state); 1757 ACPI_UNLOCK; 1758 return_VOID; 1759} 1760 1761static void 1762acpi_system_eventhandler_wakeup(void *arg, int state) 1763{ 1764 ACPI_LOCK_DECL; 1765 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1766 1767 /* Well, what to do? :-) */ 1768 1769 ACPI_LOCK; 1770 ACPI_UNLOCK; 1771 1772 return_VOID; 1773} 1774 1775/* 1776 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1777 */ 1778UINT32 1779acpi_event_power_button_sleep(void *context) 1780{ 1781 struct acpi_softc *sc = (struct acpi_softc *)context; 1782 1783 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1784 1785 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1786 1787 return_VALUE (ACPI_INTERRUPT_HANDLED); 1788} 1789 1790UINT32 1791acpi_event_power_button_wake(void *context) 1792{ 1793 struct acpi_softc *sc = (struct acpi_softc *)context; 1794 1795 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1796 1797 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1798 1799 return_VALUE (ACPI_INTERRUPT_HANDLED); 1800} 1801 1802UINT32 1803acpi_event_sleep_button_sleep(void *context) 1804{ 1805 struct acpi_softc *sc = (struct acpi_softc *)context; 1806 1807 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1808 1809 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1810 1811 return_VALUE (ACPI_INTERRUPT_HANDLED); 1812} 1813 1814UINT32 1815acpi_event_sleep_button_wake(void *context) 1816{ 1817 struct acpi_softc *sc = (struct acpi_softc *)context; 1818 1819 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1820 1821 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1822 1823 return_VALUE (ACPI_INTERRUPT_HANDLED); 1824} 1825 1826/* 1827 * XXX This is kinda ugly, and should not be here. 1828 */ 1829struct acpi_staticbuf { 1830 ACPI_BUFFER buffer; 1831 char data[512]; 1832}; 1833 1834char * 1835acpi_name(ACPI_HANDLE handle) 1836{ 1837 static struct acpi_staticbuf buf; 1838 1839 ACPI_ASSERTLOCK; 1840 1841 buf.buffer.Length = 512; 1842 buf.buffer.Pointer = &buf.data[0]; 1843 1844 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer))) 1845 return (buf.buffer.Pointer); 1846 1847 return ("(unknown path)"); 1848} 1849 1850/* 1851 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1852 * parts of the namespace. 1853 */ 1854int 1855acpi_avoid(ACPI_HANDLE handle) 1856{ 1857 char *cp, *env, *np; 1858 int len; 1859 1860 np = acpi_name(handle); 1861 if (*np == '\\') 1862 np++; 1863 if ((env = getenv("debug.acpi.avoid")) == NULL) 1864 return (0); 1865 1866 /* Scan the avoid list checking for a match */ 1867 cp = env; 1868 for (;;) { 1869 while ((*cp != 0) && isspace(*cp)) 1870 cp++; 1871 if (*cp == 0) 1872 break; 1873 len = 0; 1874 while ((cp[len] != 0) && !isspace(cp[len])) 1875 len++; 1876 if (!strncmp(cp, np, len)) { 1877 freeenv(env); 1878 return(1); 1879 } 1880 cp += len; 1881 } 1882 freeenv(env); 1883 1884 return (0); 1885} 1886 1887/* 1888 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1889 */ 1890int 1891acpi_disabled(char *subsys) 1892{ 1893 char *cp, *env; 1894 int len; 1895 1896 if ((env = getenv("debug.acpi.disabled")) == NULL) 1897 return (0); 1898 if (strcmp(env, "all") == 0) { 1899 freeenv(env); 1900 return (1); 1901 } 1902 1903 /* Scan the disable list, checking for a match. */ 1904 cp = env; 1905 for (;;) { 1906 while (*cp != '\0' && isspace(*cp)) 1907 cp++; 1908 if (*cp == '\0') 1909 break; 1910 len = 0; 1911 while (cp[len] != '\0' && !isspace(cp[len])) 1912 len++; 1913 if (strncmp(cp, subsys, len) == 0) { 1914 freeenv(env); 1915 return (1); 1916 } 1917 cp += len; 1918 } 1919 freeenv(env); 1920 1921 return (0); 1922} 1923 1924/* 1925 * Device wake capability enable/disable. 1926 */ 1927void 1928acpi_device_enable_wake_capability(ACPI_HANDLE h, int enable) 1929{ 1930 ACPI_OBJECT_LIST ArgList; 1931 ACPI_OBJECT Arg; 1932 1933 /* 1934 * TBD: All Power Resources referenced by elements 2 through N 1935 * of the _PRW object are put into the ON state. 1936 */ 1937 1938 ArgList.Count = 1; 1939 ArgList.Pointer = &Arg; 1940 1941 Arg.Type = ACPI_TYPE_INTEGER; 1942 Arg.Integer.Value = enable; 1943 1944 (void)AcpiEvaluateObject(h, "_PSW", &ArgList, NULL); 1945} 1946 1947void 1948acpi_device_enable_wake_event(ACPI_HANDLE h) 1949{ 1950 struct acpi_softc *sc; 1951 ACPI_STATUS status; 1952 ACPI_BUFFER prw_buffer; 1953 ACPI_OBJECT *res; 1954 1955 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1956 1957 sc = devclass_get_softc(acpi_devclass, 0); 1958 if (sc == NULL) 1959 return; 1960 1961 /* 1962 * _PRW object is only required for devices that have the ability 1963 * to wake the system from a system sleeping state. 1964 */ 1965 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 1966 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 1967 if (ACPI_FAILURE(status)) 1968 return; 1969 1970 res = (ACPI_OBJECT *)prw_buffer.Pointer; 1971 if (res == NULL) 1972 return; 1973 1974 if ((res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count < 2)) { 1975 goto out; 1976 } 1977 1978 /* 1979 * The element 1 of the _PRW object: 1980 * The lowest power system sleeping state that can be entered 1981 * while still providing wake functionality. 1982 * The sleeping state being entered must be greater or equal to 1983 * the power state declared in element 1 of the _PRW object. 1984 */ 1985 if (res->Package.Elements[1].Type != ACPI_TYPE_INTEGER) 1986 goto out; 1987 1988 if (sc->acpi_sstate > res->Package.Elements[1].Integer.Value) 1989 goto out; 1990 1991 /* 1992 * The element 0 of the _PRW object: 1993 */ 1994 switch(res->Package.Elements[0].Type) { 1995 case ACPI_TYPE_INTEGER: 1996 /* 1997 * If the data type of this package element is numeric, then this 1998 * _PRW package element is the bit index in the GPEx_EN, in the 1999 * GPE blocks described in the FADT, of the enable bit that is 2000 * enabled for the wake event. 2001 */ 2002 2003 status = AcpiEnableGpe(NULL, res->Package.Elements[0].Integer.Value, 2004 ACPI_EVENT_WAKE_ENABLE); 2005 if (ACPI_FAILURE(status)) 2006 printf("%s: EnableEvent Failed\n", __func__); 2007 break; 2008 case ACPI_TYPE_PACKAGE: 2009 /* 2010 * XXX TBD 2011 * 2012 * If the data type of this package element is a package, then this 2013 * _PRW package element is itself a package containing two 2014 * elements. The first is an object reference to the GPE Block 2015 * device that contains the GPE that will be triggered by the wake 2016 * event. The second element is numeric and it contains the bit 2017 * index in the GPEx_EN, in the GPE Block referenced by the 2018 * first element in the package, of the enable bit that is enabled for 2019 * the wake event. 2020 * For example, if this field is a package then it is of the form: 2021 * Package() {\_SB.PCI0.ISA.GPE, 2} 2022 */ 2023 break; 2024 default: 2025 break; 2026 } 2027 2028out: 2029 if (prw_buffer.Pointer != NULL) 2030 AcpiOsFree(prw_buffer.Pointer); 2031} 2032 2033/* 2034 * Control interface. 2035 * 2036 * We multiplex ioctls for all participating ACPI devices here. Individual 2037 * drivers wanting to be accessible via /dev/acpi should use the 2038 * register/deregister interface to make their handlers visible. 2039 */ 2040struct acpi_ioctl_hook 2041{ 2042 TAILQ_ENTRY(acpi_ioctl_hook) link; 2043 u_long cmd; 2044 acpi_ioctl_fn fn; 2045 void *arg; 2046}; 2047 2048static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2049static int acpi_ioctl_hooks_initted; 2050 2051/* 2052 * Register an ioctl handler. 2053 */ 2054int 2055acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2056{ 2057 struct acpi_ioctl_hook *hp; 2058 2059 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2060 return (ENOMEM); 2061 hp->cmd = cmd; 2062 hp->fn = fn; 2063 hp->arg = arg; 2064 if (acpi_ioctl_hooks_initted == 0) { 2065 TAILQ_INIT(&acpi_ioctl_hooks); 2066 acpi_ioctl_hooks_initted = 1; 2067 } 2068 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2069 return (0); 2070} 2071 2072/* 2073 * Deregister an ioctl handler. 2074 */ 2075void 2076acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2077{ 2078 struct acpi_ioctl_hook *hp; 2079 2080 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2081 if ((hp->cmd == cmd) && (hp->fn == fn)) 2082 break; 2083 2084 if (hp != NULL) { 2085 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2086 free(hp, M_ACPIDEV); 2087 } 2088} 2089 2090static int 2091acpiopen(dev_t dev, int flag, int fmt, d_thread_t *td) 2092{ 2093 return (0); 2094} 2095 2096static int 2097acpiclose(dev_t dev, int flag, int fmt, d_thread_t *td) 2098{ 2099 return (0); 2100} 2101 2102static int 2103acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2104{ 2105 struct acpi_softc *sc; 2106 struct acpi_ioctl_hook *hp; 2107 int error, xerror, state; 2108 ACPI_LOCK_DECL; 2109 2110 ACPI_LOCK; 2111 2112 error = state = 0; 2113 sc = dev->si_drv1; 2114 2115 /* 2116 * Scan the list of registered ioctls, looking for handlers. 2117 */ 2118 if (acpi_ioctl_hooks_initted) { 2119 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 2120 if (hp->cmd == cmd) { 2121 xerror = hp->fn(cmd, addr, hp->arg); 2122 if (xerror != 0) 2123 error = xerror; 2124 goto out; 2125 } 2126 } 2127 } 2128 2129 /* 2130 * Core ioctls are not permitted for non-writable user. 2131 * Currently, other ioctls just fetch information. 2132 * Not changing system behavior. 2133 */ 2134 if((flag & FWRITE) == 0) 2135 return (EPERM); 2136 2137 /* Core system ioctls. */ 2138 switch (cmd) { 2139 case ACPIIO_ENABLE: 2140 if (ACPI_FAILURE(acpi_Enable(sc))) 2141 error = ENXIO; 2142 break; 2143 case ACPIIO_DISABLE: 2144 if (ACPI_FAILURE(acpi_Disable(sc))) 2145 error = ENXIO; 2146 break; 2147 case ACPIIO_SETSLPSTATE: 2148 if (!sc->acpi_enabled) { 2149 error = ENXIO; 2150 break; 2151 } 2152 state = *(int *)addr; 2153 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 2154 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 2155 error = EINVAL; 2156 } else { 2157 error = EINVAL; 2158 } 2159 break; 2160 default: 2161 if (error == 0) 2162 error = EINVAL; 2163 break; 2164 } 2165 2166out: 2167 ACPI_UNLOCK; 2168 return (error); 2169} 2170 2171static int 2172acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2173{ 2174 char sleep_state[4]; 2175 char buf[16]; 2176 int error; 2177 UINT8 state, TypeA, TypeB; 2178 2179 buf[0] = '\0'; 2180 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX+1; state++) { 2181 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 2182 sprintf(sleep_state, "S%d ", state); 2183 strcat(buf, sleep_state); 2184 } 2185 } 2186 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 2187 return (error); 2188} 2189 2190static int 2191acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2192{ 2193 char sleep_state[10]; 2194 int error; 2195 u_int new_state, old_state; 2196 2197 old_state = *(u_int *)oidp->oid_arg1; 2198 if (old_state > ACPI_S_STATES_MAX+1) { 2199 strcpy(sleep_state, "unknown"); 2200 } else { 2201 bzero(sleep_state, sizeof(sleep_state)); 2202 strncpy(sleep_state, sleep_state_names[old_state], 2203 sizeof(sleep_state_names[old_state])); 2204 } 2205 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 2206 if (error == 0 && req->newptr != NULL) { 2207 new_state = ACPI_STATE_S0; 2208 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) { 2209 if (strncmp(sleep_state, sleep_state_names[new_state], 2210 sizeof(sleep_state)) == 0) 2211 break; 2212 } 2213 if (new_state <= ACPI_S_STATES_MAX + 1) { 2214 if (new_state != old_state) 2215 *(u_int *)oidp->oid_arg1 = new_state; 2216 } else { 2217 error = EINVAL; 2218 } 2219 } 2220 2221 return (error); 2222} 2223 2224/* Inform devctl(4) when we receive a Notify. */ 2225void 2226acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 2227{ 2228 char notify_buf[16]; 2229 ACPI_BUFFER handle_buf; 2230 ACPI_STATUS status; 2231 2232 if (subsystem == NULL) 2233 return; 2234 2235 handle_buf.Pointer = NULL; 2236 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 2237 status = AcpiNsHandleToPathname(h, &handle_buf); 2238 if (ACPI_FAILURE(status)) 2239 return; 2240 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 2241 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 2242 AcpiOsFree(handle_buf.Pointer); 2243} 2244 2245#ifdef ACPI_DEBUG 2246/* 2247 * Support for parsing debug options from the kernel environment. 2248 * 2249 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 2250 * by specifying the names of the bits in the debug.acpi.layer and 2251 * debug.acpi.level environment variables. Bits may be unset by 2252 * prefixing the bit name with !. 2253 */ 2254struct debugtag 2255{ 2256 char *name; 2257 UINT32 value; 2258}; 2259 2260static struct debugtag dbg_layer[] = { 2261 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2262 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2263 {"ACPI_EVENTS", ACPI_EVENTS}, 2264 {"ACPI_TABLES", ACPI_TABLES}, 2265 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2266 {"ACPI_PARSER", ACPI_PARSER}, 2267 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2268 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2269 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2270 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2271 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2272 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2273 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2274 2275 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2276 {"ACPI_BATTERY", ACPI_BATTERY}, 2277 {"ACPI_BUS", ACPI_BUS}, 2278 {"ACPI_BUTTON", ACPI_BUTTON}, 2279 {"ACPI_EC", ACPI_EC}, 2280 {"ACPI_FAN", ACPI_FAN}, 2281 {"ACPI_POWERRES", ACPI_POWERRES}, 2282 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2283 {"ACPI_THERMAL", ACPI_THERMAL}, 2284 {"ACPI_TIMER", ACPI_TIMER}, 2285 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2286 {NULL, 0} 2287}; 2288 2289static struct debugtag dbg_level[] = { 2290 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2291 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2292 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2293 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2294 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2295 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2296 2297 /* Trace verbosity level 1 [Standard Trace Level] */ 2298 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2299 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2300 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2301 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2302 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2303 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2304 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2305 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2306 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2307 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2308 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2309 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2310 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2311 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2312 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2313 2314 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2315 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2316 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2317 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2318 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2319 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2320 2321 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2322 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2323 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2324 {"ACPI_LV_IO", ACPI_LV_IO}, 2325 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2326 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2327 2328 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2329 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2330 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2331 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2332 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2333 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2334 {NULL, 0} 2335}; 2336 2337static void 2338acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2339{ 2340 char *ep; 2341 int i, l; 2342 int set; 2343 2344 while (*cp) { 2345 if (isspace(*cp)) { 2346 cp++; 2347 continue; 2348 } 2349 ep = cp; 2350 while (*ep && !isspace(*ep)) 2351 ep++; 2352 if (*cp == '!') { 2353 set = 0; 2354 cp++; 2355 if (cp == ep) 2356 continue; 2357 } else { 2358 set = 1; 2359 } 2360 l = ep - cp; 2361 for (i = 0; tag[i].name != NULL; i++) { 2362 if (!strncmp(cp, tag[i].name, l)) { 2363 if (set) 2364 *flag |= tag[i].value; 2365 else 2366 *flag &= ~tag[i].value; 2367 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 2368 } 2369 } 2370 cp = ep; 2371 } 2372} 2373 2374static void 2375acpi_set_debugging(void *junk) 2376{ 2377 char *cp; 2378 2379 if (cold) { 2380 AcpiDbgLayer = 0; 2381 AcpiDbgLevel = 0; 2382 } 2383 2384 if ((cp = getenv("debug.acpi.layer")) != NULL) { 2385 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 2386 freeenv(cp); 2387 } 2388 if ((cp = getenv("debug.acpi.level")) != NULL) { 2389 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 2390 freeenv(cp); 2391 } 2392 2393 if (cold) { 2394 printf("ACPI debug layer 0x%x debug level 0x%x\n", 2395 AcpiDbgLayer, AcpiDbgLevel); 2396 } 2397} 2398SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 2399 NULL); 2400 2401static int 2402acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 2403{ 2404 int error, *dbg; 2405 struct debugtag *tag; 2406 struct sbuf sb; 2407 2408 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 2409 return (ENOMEM); 2410 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 2411 tag = &dbg_layer[0]; 2412 dbg = &AcpiDbgLayer; 2413 } else { 2414 tag = &dbg_level[0]; 2415 dbg = &AcpiDbgLevel; 2416 } 2417 2418 /* Get old values if this is a get request. */ 2419 if (*dbg == 0) { 2420 sbuf_cpy(&sb, "NONE"); 2421 } else if (req->newptr == NULL) { 2422 for (; tag->name != NULL; tag++) { 2423 if ((*dbg & tag->value) == tag->value) 2424 sbuf_printf(&sb, "%s ", tag->name); 2425 } 2426 } 2427 sbuf_trim(&sb); 2428 sbuf_finish(&sb); 2429 2430 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 2431 sbuf_delete(&sb); 2432 2433 /* If the user is setting a string, parse it. */ 2434 if (error == 0 && req->newptr != NULL) { 2435 *dbg = 0; 2436 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 2437 acpi_set_debugging(NULL); 2438 } 2439 2440 return (error); 2441} 2442SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 2443 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 2444SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 2445 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 2446#endif 2447 2448static int 2449acpi_pm_func(u_long cmd, void *arg, ...) 2450{ 2451 int state, acpi_state; 2452 int error; 2453 struct acpi_softc *sc; 2454 va_list ap; 2455 2456 error = 0; 2457 switch (cmd) { 2458 case POWER_CMD_SUSPEND: 2459 sc = (struct acpi_softc *)arg; 2460 if (sc == NULL) { 2461 error = EINVAL; 2462 goto out; 2463 } 2464 2465 va_start(ap, arg); 2466 state = va_arg(ap, int); 2467 va_end(ap); 2468 2469 switch (state) { 2470 case POWER_SLEEP_STATE_STANDBY: 2471 acpi_state = sc->acpi_standby_sx; 2472 break; 2473 case POWER_SLEEP_STATE_SUSPEND: 2474 acpi_state = sc->acpi_suspend_sx; 2475 break; 2476 case POWER_SLEEP_STATE_HIBERNATE: 2477 acpi_state = ACPI_STATE_S4; 2478 break; 2479 default: 2480 error = EINVAL; 2481 goto out; 2482 } 2483 2484 acpi_SetSleepState(sc, acpi_state); 2485 break; 2486 default: 2487 error = EINVAL; 2488 goto out; 2489 } 2490 2491out: 2492 return (error); 2493} 2494 2495static void 2496acpi_pm_register(void *arg) 2497{ 2498 if (!cold || resource_disabled("acpi", 0)) 2499 return; 2500 2501 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 2502} 2503 2504SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 2505